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790 lines
20 KiB
790 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/drivers/firmware/edd.c |
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* Copyright (C) 2002, 2003, 2004 Dell Inc. |
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* by Matt Domsch <[email protected]> |
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* disk signature by Matt Domsch, Andrew Wilks, and Sandeep K. Shandilya |
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* legacy CHS by Patrick J. LoPresti <[email protected]> |
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* |
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* BIOS Enhanced Disk Drive Services (EDD) |
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* conformant to T13 Committee www.t13.org |
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* projects 1572D, 1484D, 1386D, 1226DT |
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* |
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* This code takes information provided by BIOS EDD calls |
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* fn41 - Check Extensions Present and |
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* fn48 - Get Device Parameters with EDD extensions |
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* made in setup.S, copied to safe structures in setup.c, |
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* and presents it in sysfs. |
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* |
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* Please see http://linux.dell.com/edd/results.html for |
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* the list of BIOSs which have been reported to implement EDD. |
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*/ |
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#include <linux/module.h> |
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#include <linux/string.h> |
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#include <linux/types.h> |
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#include <linux/init.h> |
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#include <linux/stat.h> |
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#include <linux/err.h> |
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#include <linux/ctype.h> |
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#include <linux/slab.h> |
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#include <linux/limits.h> |
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#include <linux/device.h> |
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#include <linux/pci.h> |
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#include <linux/blkdev.h> |
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#include <linux/edd.h> |
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#define EDD_VERSION "0.16" |
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#define EDD_DATE "2004-Jun-25" |
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MODULE_AUTHOR("Matt Domsch <[email protected]>"); |
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MODULE_DESCRIPTION("sysfs interface to BIOS EDD information"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION(EDD_VERSION); |
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#define left (PAGE_SIZE - (p - buf) - 1) |
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struct edd_device { |
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unsigned int index; |
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unsigned int mbr_signature; |
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struct edd_info *info; |
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struct kobject kobj; |
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}; |
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struct edd_attribute { |
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struct attribute attr; |
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ssize_t(*show) (struct edd_device * edev, char *buf); |
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int (*test) (struct edd_device * edev); |
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}; |
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|
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/* forward declarations */ |
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static int edd_dev_is_type(struct edd_device *edev, const char *type); |
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static struct pci_dev *edd_get_pci_dev(struct edd_device *edev); |
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|
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static struct edd_device *edd_devices[EDD_MBR_SIG_MAX]; |
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|
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#define EDD_DEVICE_ATTR(_name,_mode,_show,_test) \ |
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struct edd_attribute edd_attr_##_name = { \ |
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.attr = {.name = __stringify(_name), .mode = _mode }, \ |
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.show = _show, \ |
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.test = _test, \ |
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}; |
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static int |
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edd_has_mbr_signature(struct edd_device *edev) |
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{ |
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return edev->index < min_t(unsigned char, edd.mbr_signature_nr, EDD_MBR_SIG_MAX); |
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} |
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static int |
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edd_has_edd_info(struct edd_device *edev) |
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{ |
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return edev->index < min_t(unsigned char, edd.edd_info_nr, EDDMAXNR); |
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} |
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|
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static inline struct edd_info * |
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edd_dev_get_info(struct edd_device *edev) |
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{ |
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return edev->info; |
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} |
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|
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static inline void |
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edd_dev_set_info(struct edd_device *edev, int i) |
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{ |
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edev->index = i; |
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if (edd_has_mbr_signature(edev)) |
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edev->mbr_signature = edd.mbr_signature[i]; |
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if (edd_has_edd_info(edev)) |
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edev->info = &edd.edd_info[i]; |
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} |
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#define to_edd_attr(_attr) container_of(_attr,struct edd_attribute,attr) |
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#define to_edd_device(obj) container_of(obj,struct edd_device,kobj) |
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|
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static ssize_t |
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edd_attr_show(struct kobject * kobj, struct attribute *attr, char *buf) |
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{ |
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struct edd_device *dev = to_edd_device(kobj); |
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struct edd_attribute *edd_attr = to_edd_attr(attr); |
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ssize_t ret = -EIO; |
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if (edd_attr->show) |
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ret = edd_attr->show(dev, buf); |
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return ret; |
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} |
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static const struct sysfs_ops edd_attr_ops = { |
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.show = edd_attr_show, |
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}; |
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static ssize_t |
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edd_show_host_bus(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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int i; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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for (i = 0; i < 4; i++) { |
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if (isprint(info->params.host_bus_type[i])) { |
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p += scnprintf(p, left, "%c", info->params.host_bus_type[i]); |
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} else { |
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p += scnprintf(p, left, " "); |
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} |
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} |
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if (!strncmp(info->params.host_bus_type, "ISA", 3)) { |
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p += scnprintf(p, left, "\tbase_address: %x\n", |
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info->params.interface_path.isa.base_address); |
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} else if (!strncmp(info->params.host_bus_type, "PCIX", 4) || |
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!strncmp(info->params.host_bus_type, "PCI", 3) || |
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!strncmp(info->params.host_bus_type, "XPRS", 4)) { |
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p += scnprintf(p, left, |
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"\t%02x:%02x.%d channel: %u\n", |
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info->params.interface_path.pci.bus, |
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info->params.interface_path.pci.slot, |
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info->params.interface_path.pci.function, |
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info->params.interface_path.pci.channel); |
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} else if (!strncmp(info->params.host_bus_type, "IBND", 4) || |
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!strncmp(info->params.host_bus_type, "HTPT", 4)) { |
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p += scnprintf(p, left, |
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"\tTBD: %llx\n", |
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info->params.interface_path.ibnd.reserved); |
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} else { |
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p += scnprintf(p, left, "\tunknown: %llx\n", |
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info->params.interface_path.unknown.reserved); |
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} |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_interface(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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int i; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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for (i = 0; i < 8; i++) { |
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if (isprint(info->params.interface_type[i])) { |
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p += scnprintf(p, left, "%c", info->params.interface_type[i]); |
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} else { |
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p += scnprintf(p, left, " "); |
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} |
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} |
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if (!strncmp(info->params.interface_type, "ATAPI", 5)) { |
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p += scnprintf(p, left, "\tdevice: %u lun: %u\n", |
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info->params.device_path.atapi.device, |
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info->params.device_path.atapi.lun); |
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} else if (!strncmp(info->params.interface_type, "ATA", 3)) { |
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p += scnprintf(p, left, "\tdevice: %u\n", |
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info->params.device_path.ata.device); |
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} else if (!strncmp(info->params.interface_type, "SCSI", 4)) { |
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p += scnprintf(p, left, "\tid: %u lun: %llu\n", |
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info->params.device_path.scsi.id, |
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info->params.device_path.scsi.lun); |
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} else if (!strncmp(info->params.interface_type, "USB", 3)) { |
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p += scnprintf(p, left, "\tserial_number: %llx\n", |
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info->params.device_path.usb.serial_number); |
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} else if (!strncmp(info->params.interface_type, "1394", 4)) { |
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p += scnprintf(p, left, "\teui: %llx\n", |
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info->params.device_path.i1394.eui); |
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} else if (!strncmp(info->params.interface_type, "FIBRE", 5)) { |
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p += scnprintf(p, left, "\twwid: %llx lun: %llx\n", |
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info->params.device_path.fibre.wwid, |
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info->params.device_path.fibre.lun); |
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} else if (!strncmp(info->params.interface_type, "I2O", 3)) { |
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p += scnprintf(p, left, "\tidentity_tag: %llx\n", |
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info->params.device_path.i2o.identity_tag); |
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} else if (!strncmp(info->params.interface_type, "RAID", 4)) { |
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p += scnprintf(p, left, "\tidentity_tag: %x\n", |
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info->params.device_path.raid.array_number); |
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} else if (!strncmp(info->params.interface_type, "SATA", 4)) { |
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p += scnprintf(p, left, "\tdevice: %u\n", |
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info->params.device_path.sata.device); |
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} else { |
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p += scnprintf(p, left, "\tunknown: %llx %llx\n", |
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info->params.device_path.unknown.reserved1, |
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info->params.device_path.unknown.reserved2); |
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} |
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return (p - buf); |
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} |
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/** |
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* edd_show_raw_data() - copies raw data to buffer for userspace to parse |
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* @edev: target edd_device |
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* @buf: output buffer |
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* |
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* Returns: number of bytes written, or -EINVAL on failure |
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*/ |
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static ssize_t |
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edd_show_raw_data(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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ssize_t len = sizeof (info->params); |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) |
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len = info->params.length; |
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/* In case of buggy BIOSs */ |
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if (len > (sizeof(info->params))) |
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len = sizeof(info->params); |
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memcpy(buf, &info->params, len); |
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return len; |
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} |
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static ssize_t |
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edd_show_version(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "0x%02x\n", info->version); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_mbr_signature(struct edd_device *edev, char *buf) |
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{ |
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char *p = buf; |
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p += scnprintf(p, left, "0x%08x\n", edev->mbr_signature); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_extensions(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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if (info->interface_support & EDD_EXT_FIXED_DISK_ACCESS) { |
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p += scnprintf(p, left, "Fixed disk access\n"); |
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} |
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if (info->interface_support & EDD_EXT_DEVICE_LOCKING_AND_EJECTING) { |
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p += scnprintf(p, left, "Device locking and ejecting\n"); |
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} |
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if (info->interface_support & EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT) { |
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p += scnprintf(p, left, "Enhanced Disk Drive support\n"); |
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} |
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if (info->interface_support & EDD_EXT_64BIT_EXTENSIONS) { |
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p += scnprintf(p, left, "64-bit extensions\n"); |
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} |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_info_flags(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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if (info->params.info_flags & EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT) |
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p += scnprintf(p, left, "DMA boundary error transparent\n"); |
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if (info->params.info_flags & EDD_INFO_GEOMETRY_VALID) |
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p += scnprintf(p, left, "geometry valid\n"); |
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if (info->params.info_flags & EDD_INFO_REMOVABLE) |
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p += scnprintf(p, left, "removable\n"); |
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if (info->params.info_flags & EDD_INFO_WRITE_VERIFY) |
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p += scnprintf(p, left, "write verify\n"); |
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if (info->params.info_flags & EDD_INFO_MEDIA_CHANGE_NOTIFICATION) |
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p += scnprintf(p, left, "media change notification\n"); |
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if (info->params.info_flags & EDD_INFO_LOCKABLE) |
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p += scnprintf(p, left, "lockable\n"); |
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if (info->params.info_flags & EDD_INFO_NO_MEDIA_PRESENT) |
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p += scnprintf(p, left, "no media present\n"); |
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if (info->params.info_flags & EDD_INFO_USE_INT13_FN50) |
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p += scnprintf(p, left, "use int13 fn50\n"); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_legacy_max_cylinder(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->legacy_max_cylinder); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_legacy_max_head(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->legacy_max_head); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_legacy_sectors_per_track(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->legacy_sectors_per_track); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_default_cylinders(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->params.num_default_cylinders); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_default_heads(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->params.num_default_heads); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_default_sectors_per_track(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%u\n", info->params.sectors_per_track); |
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return (p - buf); |
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} |
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static ssize_t |
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edd_show_sectors(struct edd_device *edev, char *buf) |
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{ |
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struct edd_info *info; |
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char *p = buf; |
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if (!edev) |
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return -EINVAL; |
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info = edd_dev_get_info(edev); |
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if (!info || !buf) |
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return -EINVAL; |
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p += scnprintf(p, left, "%llu\n", info->params.number_of_sectors); |
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return (p - buf); |
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} |
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/* |
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* Some device instances may not have all the above attributes, |
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* or the attribute values may be meaningless (i.e. if |
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* the device is < EDD 3.0, it won't have host_bus and interface |
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* information), so don't bother making files for them. Likewise |
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* if the default_{cylinders,heads,sectors_per_track} values |
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* are zero, the BIOS doesn't provide sane values, don't bother |
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* creating files for them either. |
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*/ |
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static int |
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edd_has_legacy_max_cylinder(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->legacy_max_cylinder > 0; |
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} |
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static int |
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edd_has_legacy_max_head(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->legacy_max_head > 0; |
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} |
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static int |
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edd_has_legacy_sectors_per_track(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->legacy_sectors_per_track > 0; |
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} |
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static int |
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edd_has_default_cylinders(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->params.num_default_cylinders > 0; |
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} |
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static int |
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edd_has_default_heads(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->params.num_default_heads > 0; |
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} |
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|
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static int |
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edd_has_default_sectors_per_track(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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return info->params.sectors_per_track > 0; |
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} |
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|
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static int |
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edd_has_edd30(struct edd_device *edev) |
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{ |
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struct edd_info *info; |
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int i; |
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u8 csum = 0; |
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|
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if (!edev) |
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return 0; |
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info = edd_dev_get_info(edev); |
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if (!info) |
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return 0; |
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|
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if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) { |
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return 0; |
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} |
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|
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|
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/* We support only T13 spec */ |
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if (info->params.device_path_info_length != 44) |
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return 0; |
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|
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for (i = 30; i < info->params.device_path_info_length + 30; i++) |
|
csum += *(((u8 *)&info->params) + i); |
|
|
|
if (csum) |
|
return 0; |
|
|
|
return 1; |
|
} |
|
|
|
|
|
static EDD_DEVICE_ATTR(raw_data, 0444, edd_show_raw_data, edd_has_edd_info); |
|
static EDD_DEVICE_ATTR(version, 0444, edd_show_version, edd_has_edd_info); |
|
static EDD_DEVICE_ATTR(extensions, 0444, edd_show_extensions, edd_has_edd_info); |
|
static EDD_DEVICE_ATTR(info_flags, 0444, edd_show_info_flags, edd_has_edd_info); |
|
static EDD_DEVICE_ATTR(sectors, 0444, edd_show_sectors, edd_has_edd_info); |
|
static EDD_DEVICE_ATTR(legacy_max_cylinder, 0444, |
|
edd_show_legacy_max_cylinder, |
|
edd_has_legacy_max_cylinder); |
|
static EDD_DEVICE_ATTR(legacy_max_head, 0444, edd_show_legacy_max_head, |
|
edd_has_legacy_max_head); |
|
static EDD_DEVICE_ATTR(legacy_sectors_per_track, 0444, |
|
edd_show_legacy_sectors_per_track, |
|
edd_has_legacy_sectors_per_track); |
|
static EDD_DEVICE_ATTR(default_cylinders, 0444, edd_show_default_cylinders, |
|
edd_has_default_cylinders); |
|
static EDD_DEVICE_ATTR(default_heads, 0444, edd_show_default_heads, |
|
edd_has_default_heads); |
|
static EDD_DEVICE_ATTR(default_sectors_per_track, 0444, |
|
edd_show_default_sectors_per_track, |
|
edd_has_default_sectors_per_track); |
|
static EDD_DEVICE_ATTR(interface, 0444, edd_show_interface, edd_has_edd30); |
|
static EDD_DEVICE_ATTR(host_bus, 0444, edd_show_host_bus, edd_has_edd30); |
|
static EDD_DEVICE_ATTR(mbr_signature, 0444, edd_show_mbr_signature, edd_has_mbr_signature); |
|
|
|
|
|
/* These are default attributes that are added for every edd |
|
* device discovered. There are none. |
|
*/ |
|
static struct attribute * def_attrs[] = { |
|
NULL, |
|
}; |
|
|
|
/* These attributes are conditional and only added for some devices. */ |
|
static struct edd_attribute * edd_attrs[] = { |
|
&edd_attr_raw_data, |
|
&edd_attr_version, |
|
&edd_attr_extensions, |
|
&edd_attr_info_flags, |
|
&edd_attr_sectors, |
|
&edd_attr_legacy_max_cylinder, |
|
&edd_attr_legacy_max_head, |
|
&edd_attr_legacy_sectors_per_track, |
|
&edd_attr_default_cylinders, |
|
&edd_attr_default_heads, |
|
&edd_attr_default_sectors_per_track, |
|
&edd_attr_interface, |
|
&edd_attr_host_bus, |
|
&edd_attr_mbr_signature, |
|
NULL, |
|
}; |
|
|
|
/** |
|
* edd_release - free edd structure |
|
* @kobj: kobject of edd structure |
|
* |
|
* This is called when the refcount of the edd structure |
|
* reaches 0. This should happen right after we unregister, |
|
* but just in case, we use the release callback anyway. |
|
*/ |
|
|
|
static void edd_release(struct kobject * kobj) |
|
{ |
|
struct edd_device * dev = to_edd_device(kobj); |
|
kfree(dev); |
|
} |
|
|
|
static struct kobj_type edd_ktype = { |
|
.release = edd_release, |
|
.sysfs_ops = &edd_attr_ops, |
|
.default_attrs = def_attrs, |
|
}; |
|
|
|
static struct kset *edd_kset; |
|
|
|
|
|
/** |
|
* edd_dev_is_type() - is this EDD device a 'type' device? |
|
* @edev: target edd_device |
|
* @type: a host bus or interface identifier string per the EDD spec |
|
* |
|
* Returns 1 (TRUE) if it is a 'type' device, 0 otherwise. |
|
*/ |
|
static int |
|
edd_dev_is_type(struct edd_device *edev, const char *type) |
|
{ |
|
struct edd_info *info; |
|
if (!edev) |
|
return 0; |
|
info = edd_dev_get_info(edev); |
|
|
|
if (type && info) { |
|
if (!strncmp(info->params.host_bus_type, type, strlen(type)) || |
|
!strncmp(info->params.interface_type, type, strlen(type))) |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* edd_get_pci_dev() - finds pci_dev that matches edev |
|
* @edev: edd_device |
|
* |
|
* Returns pci_dev if found, or NULL |
|
*/ |
|
static struct pci_dev * |
|
edd_get_pci_dev(struct edd_device *edev) |
|
{ |
|
struct edd_info *info = edd_dev_get_info(edev); |
|
|
|
if (edd_dev_is_type(edev, "PCI") || edd_dev_is_type(edev, "XPRS")) { |
|
return pci_get_domain_bus_and_slot(0, |
|
info->params.interface_path.pci.bus, |
|
PCI_DEVFN(info->params.interface_path.pci.slot, |
|
info->params.interface_path.pci.function)); |
|
} |
|
return NULL; |
|
} |
|
|
|
static int |
|
edd_create_symlink_to_pcidev(struct edd_device *edev) |
|
{ |
|
|
|
struct pci_dev *pci_dev = edd_get_pci_dev(edev); |
|
int ret; |
|
if (!pci_dev) |
|
return 1; |
|
ret = sysfs_create_link(&edev->kobj,&pci_dev->dev.kobj,"pci_dev"); |
|
pci_dev_put(pci_dev); |
|
return ret; |
|
} |
|
|
|
static inline void |
|
edd_device_unregister(struct edd_device *edev) |
|
{ |
|
kobject_put(&edev->kobj); |
|
} |
|
|
|
static void edd_populate_dir(struct edd_device * edev) |
|
{ |
|
struct edd_attribute * attr; |
|
int error = 0; |
|
int i; |
|
|
|
for (i = 0; (attr = edd_attrs[i]) && !error; i++) { |
|
if (!attr->test || |
|
(attr->test && attr->test(edev))) |
|
error = sysfs_create_file(&edev->kobj,&attr->attr); |
|
} |
|
|
|
if (!error) { |
|
edd_create_symlink_to_pcidev(edev); |
|
} |
|
} |
|
|
|
static int |
|
edd_device_register(struct edd_device *edev, int i) |
|
{ |
|
int error; |
|
|
|
if (!edev) |
|
return 1; |
|
edd_dev_set_info(edev, i); |
|
edev->kobj.kset = edd_kset; |
|
error = kobject_init_and_add(&edev->kobj, &edd_ktype, NULL, |
|
"int13_dev%02x", 0x80 + i); |
|
if (!error) { |
|
edd_populate_dir(edev); |
|
kobject_uevent(&edev->kobj, KOBJ_ADD); |
|
} |
|
return error; |
|
} |
|
|
|
static inline int edd_num_devices(void) |
|
{ |
|
return max_t(unsigned char, |
|
min_t(unsigned char, EDD_MBR_SIG_MAX, edd.mbr_signature_nr), |
|
min_t(unsigned char, EDDMAXNR, edd.edd_info_nr)); |
|
} |
|
|
|
/** |
|
* edd_init() - creates sysfs tree of EDD data |
|
*/ |
|
static int __init |
|
edd_init(void) |
|
{ |
|
int i; |
|
int rc=0; |
|
struct edd_device *edev; |
|
|
|
if (!edd_num_devices()) |
|
return -ENODEV; |
|
|
|
printk(KERN_INFO "BIOS EDD facility v%s %s, %d devices found\n", |
|
EDD_VERSION, EDD_DATE, edd_num_devices()); |
|
|
|
edd_kset = kset_create_and_add("edd", NULL, firmware_kobj); |
|
if (!edd_kset) |
|
return -ENOMEM; |
|
|
|
for (i = 0; i < edd_num_devices(); i++) { |
|
edev = kzalloc(sizeof (*edev), GFP_KERNEL); |
|
if (!edev) { |
|
rc = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
rc = edd_device_register(edev, i); |
|
if (rc) { |
|
kfree(edev); |
|
goto out; |
|
} |
|
edd_devices[i] = edev; |
|
} |
|
|
|
return 0; |
|
|
|
out: |
|
while (--i >= 0) |
|
edd_device_unregister(edd_devices[i]); |
|
kset_unregister(edd_kset); |
|
return rc; |
|
} |
|
|
|
static void __exit |
|
edd_exit(void) |
|
{ |
|
int i; |
|
struct edd_device *edev; |
|
|
|
for (i = 0; i < edd_num_devices(); i++) { |
|
if ((edev = edd_devices[i])) |
|
edd_device_unregister(edev); |
|
} |
|
kset_unregister(edd_kset); |
|
} |
|
|
|
late_initcall(edd_init); |
|
module_exit(edd_exit);
|
|
|